Gas-engine valve.



W. E. ROBERTS.

GAS ENGINE VALVE.

APPLIOATION FILED JAN. 9, 1911.

Patented June 16,1914.

v fm e/vfor gym m W/fnesses M Afforneyfl UNITED STATES PATENT OFFICE.

WILLIAM EVAN ROBERTS, OF PORTLAND, OREGON.

GAS-ENGIN E VALVE.

Specification of Letters Patent. Patented J ne 16 1914 Application filed January 9,1911.

Serial No. 601,602.

To all whom it may concern: Be it known that I, WILLIAM EVAN 'Boismrrs, a subject of the King of England,

The invention relates to new and useful' improvements in rotary valves for gas engines, and more especially to valves of this type which are water cooled.

An object of the invention is to provide a rotary valve -with a water chamber which separates the gas supply chamber from the exhaust ports.

A further objectof the invention is to provide a rotary valve with a central gas supply chamber and radial ports arranged so as to bring said central gas supply chamher. into connection first with one cylinder and then another, in a multiple cylinder gas engine, and a third radial port connecting said central gas chamber with a supply pipe.

These and other objects will in part be obvious, and will in part be hereinafter more fully described.

In the drawings which show by way of illustration one embodiment of the invention; Figure 1 is a central section through a gas engine having my improved water cooled rotary valve applied thereto. Fig. 2 is a sectional view on the line A. A, of Fig. 1,, with the lower part of the engine broken away. Fig. 3 is a sectional view through the valve and valve chamber on the line ll, B, of Fig. 1, certain parts being broken away. F ig. 4 is a similar view withthe valve rotated through one quarter revolution.

In the drawings. 1 have illustrated gas engine consisting of two cylinders and 3, which are connected with a suitable crank casing at the lower end. and with a valve chamber at-the upper cnd which is formed in the cylinder head 4 and valve cover 14.

Located within the valve chamber is a valve 1 which is cylindrical and has extended ends or journals 5, I), which are mounted and rotate in suitable hearings in the end of the valve chamber. The valve 1 is provided with a Water cooling chamber 7. which extends substantially the entire length .of the valve and is suitably connected through the journals 5, 5, which are hollow, with water pipes 8, 8. Unions (3, (5, are provided so as to allow the valve to rotate freely independently of the water pipes.

As herein shown, 1 have provided a beveled gear driving connection between the rotary valve 1, and crank shaft 9 of the en gine, and said driving connection, is so proportioned as to rotate the valve once for every two revolutions of the crank shaft. The cylinder 2 is connected with the valve chamber by means of a port 10, and the cylinder 3, is similarly connected through a port 11. These ports allow the free passage of the gas to and from the cylinders. An inlet port 12 is connected with a suitable gas supply 13 through which the admission of fresh to the engine cylinders is admitted under the control of the rotary Valve 1. Located centrally of the rotary .valve, is a gas chan'iber 18, which is connected to the supply 13 through a radial inlet port 19. A circumferentially disposed chamber 20 connects directly with the radial port 19 and the gas chamber 18 will therefore, be in connection with the supply while said valve is rotating si-lbstantially through an arc of 180 degrees.

A radial port 21 leads from the central chamber 18 to the outer surface of the rotary valve (see Fig. 1), and when said valve is in proper position, said port in the valve will register with the port 10 leading to the cylinder 2. and said cylinder will thereby be connected with the central gas chamber. A similar radial port 22 (see Figs. l and 23) connects the central gas chamber 18 to the port 11 lkading' to the. cylinder 3. when said rotary valve is in propcr position. The ports 21 and 22 are so disposed relative to each other, as to supply thc cylinders 2 and 3 at the proper time relative. to the stroke of the pistons in the respective cylinders.

in the drawings. 1 have shown the piston 17 operating in the cylindcr 2, and thc pist:.n 17' operating in the cylinder 3. An exhaust port 15 leads from the exhaust pipe 16 in the cylinder head to the valve clmnibcr. A circumfcrcntially dis ')osell exhaust chamber or passage 2 is arranged to register with the port 10 of the cylinder 2,

and connects the same with the exhaust port 15. Av similar exhaust chamber or passage 24 connects the port 11 of the cylinder with the exhaust port 15. These exhaust passages or chambers 23, and 24, are so disposed as to bring the cylinders into connection with the exhaust port at proper in that the heated gases passing froin .the cylinder through the exhaust port, are carried as directly. and as quickly as possible from the cylinders to the exhaust pipe 16. It will also be noted that the water chamber 7 lies between the central gas supply chamber 18 and the exhaust chamber in the r0- tary valve, and will thereby serve to -otect as far as possible the supply chamber from the heatedexhaust gase.. The engine cylinder and valve cover are provided with a water jacket 28 through which Water is circulated in the usual manner, Suitable ignition plugs 25 and 6 are shdwn at the upper ends of thecylinders ii't Fig. 1. A grease cup 27 is also provided for lubricating the valve 1.

,The operation of my device is as followsStarting with the respective parts in position as shown in Figs. 1, 2 and 3, the chamber or recess 20 in the rotary valve, 1, is connected with the inlet port 12 (see Fig. 3) which allows fresh gas to flow through the radial port 19 and fill the gas chamber.

18. -As the engine shaft rotates, the valve 1 will also rotate in the direction indicated by the arrow in the drawings and the radial port 22 will register with the port 11, there by connecting the central gas chamber with the cylinder 3, and as the piston 17' descends, gas will be'drawn into the cylinder 3. At the completion of this downward stroke of the piston 17, the outer cylindrical surface of the valve 1 will pass over and cover the port 11 and keep it covered or closed during the compression or work ing stroke of the piston 17 During the exhaust stroke of the piston 17, the exhaust chamber 24: will be-brought into register with the cylinder port 11, thus connecting the port 11 with the exhaust port 15, and permitting the burnt gases to pass from the cylinder 3, out through the exhaust port 15 into the exhaust pipe 16. In Fig. 1, the piston 17 is shown in position for the beginning of its exhaust stroke, and therefore, the exhaust chamber 23 in the valve 1 is in register with the port 10. The burnt gases will therefore, flow fror th cylinder 2 through the port 10 and ex. usi chamber 23 to the exhaust port 15. At the completion of the exhaust stroke of the piston 17, the gas supply port 21 of the rotary valve 1', will be brought into register with the radial port 10 as shown in dotted lines in Fig. 4. While the radial port 21 is in register with the port 10 leading to the cylinder 2,

the gas supply port19 through the chamavateichamber, a

ber 20 is connected with the supply pipe 13 thus permitting the piston 17 to draw a charge of fresh gas through the inlet port 12. The compression and working strokes will follow in the usual order.

Having thus particularly described my invention, what I claim as new and desire to secure by Letters Patent, is

1. ma gas engine, in combination, one or more cylinders, each provided with a single port extending crosswise thereof and adapted for use as inlet and exhaust port, a valve casing with a chamber therein communicating with said cylinders through said ports and provided in its wall With a water chamber, a rotary valve member mounted in said chamber and having formed in its innermost center, extending longitudinally thereof, a gas chamber with one or more radial ports therefrom, and having formed in its outer surface one or more open, circumferentially extending exhaust chambers, the outer wall of which is formed by the wall of said valve casing, a supply pipe to said central gas chamber, and an exhaust pipe from said valve casing.

2. In a gas engine, in combination with a plurality of cylinders, a valve casing with chamber therein communicating with said cylinders and provided in its wall with a I rotary valve member mounted in said chamber and having formed in its innermost center, extending longitudinally thereof, a gas chamber with one or more radial ports therefrom, and having formed in its outer surface one or more open, circumferentially extending exhaust chambers, the outer wall of which is formed by the wall of said valve casing, said valve member also having formed therein, extending circumferentially thereof between said central gas chamber and said outer exhaust chamber, a water chamber directly envelop.- ing said central gas chamber, av supply pipe to said gas chamber, and an exhaust pipe from said valve casing.

3. In a gas engine, in combination with a cylinder, a valve casing with chamber therein in communication with said cylinder and with an exhaust outlet therefrom, a rotary valve member mounted in said chamber and having formed in its innermost center, longitudinally thereof, a gas chamber with radial ports therefrom adapted to be moved into register with the communicating port to said cylinder, a water jacket formed in said valve member and directly enveloping said gas chamber, said valve member also having formed in its outer surface an open, circumferentially extending, exhaust chamber, the outer wall of which is formed by the wall of said valve casing. and a supply pipe to said central gas chamber, substantially as dc .cribed.

1. A gas engine including in combination, a plurality of cylinders, a cylindrical valve chamber at the upper end of saidvalve-bearings forsaid hollow journals,

water pipes, unions for connecting said water pipes to said hollow journals, said valve having a central gas chamber formed therein, radial ports leading from said central gas chamber to each of said cylinders,

a radial supply port for connecting said central gas chamber to a supply'pipe, and a water chamber extending around said said central gas chamber and connected to said hollow journals.

5. A gas engine including in combination a lurality of cylinders, a cylindrical valve qiamber at the upper end of said cylinders', Water jacket extending about said valve"ehamber, a rotary valve located in said chamber, hollow journals for said valve, bearings for said hollow journals, water pipes, unions for connectin said water pipes to-s'aid hollow journals, said valve having a central as chamber formed therein, radial ports eading "from said central gas chamber to each of said cylinders, a radial supply port'for connecting said cen tral gas chamber to a supply pipe, a water chamber extending around said central gas chamber, and connected to said hollow jour nal's, and an exhaust chamber formed in said rotaryvalve for connectingthe cylinders with the exhaust pipe, said water chamber being located between said eilhaust chamber and said ,central as chamber.

6. A as engine inclu ing in combination, a urality of cylinders, a cylindrical valve 0 amber in the upper end of said cylinders, a rotary ,valve located in said chamber, hollow ournals fior said valve, bearings for said hollow journals, water pipes, unions for connecting the water pipes to said hollow journals, said valve havm a central-gas chamber formed therein, ra 1al ports leading from said central gas chamber to each of said cylinders, a radial supply port in the valve and connecting with said central gas chamber, a fuel supplyI pipe,

said valve having a circumferentia disposed passage formed therein. for connect ing the radial supply port with the fuel supply pipe, a Water chamber extending around said central gas chamber, and connected to said hollow journals, and circumferentially disposed exhaust chamber formed in said rotary valve, and connecting the cylinders with the exhaust pipe, said water chamber being located between the exhaust chamber and said central gas chamber.

In testimony whereof I aflix my signature, in presence of two witnesses.

WILLIAM EVAN ROBERTS. [L s.']

Witnesses:

" FRANK A. BULLINGTON AJz'rHUR LANGGUTH. 

